function fakeAsync(){
  let delay = Math.random() * 1000;

  return new Promise((resolve,reject)=>{
    setTimeout(()=>{
      console.log(`Async Task use ${delay}ms`);
      resolve(delay);
    },delay);
  });

}
console.log('start...');
(async () => {
  await fakeAsync();
})();

method.exports = fakeAsync;
